SELF-SUPPORTING SOUND-ABSORBING PLATE
PROBLEM TO BE SOLVED: To provide a self-supporting sound-absorbing plate for a road, which can be easily installed in a space-saving manner, and which can enhance sound-insulating performance. SOLUTION: This self-supporting sound-absorbing plate 1 is composed of a fence-shaped skeleton 2 made of con...
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| creator | HOSHINA NORIKO NAKATANI IKUO GOTO HIROYUKI ITO AKIHIKO WAKAYAMA HIROYASU KONDO SEIICHI OWAKI MASANAO TANAKA HIDEKI |
| description | PROBLEM TO BE SOLVED: To provide a self-supporting sound-absorbing plate for a road, which can be easily installed in a space-saving manner, and which can enhance sound-insulating performance. SOLUTION: This self-supporting sound-absorbing plate 1 is composed of a fence-shaped skeleton 2 made of concrete, and a porous concrete panel 3 which is stuck on one side surface or both side surfaces of the skeleton 2. A C-shaped fitting 4 is attached to front and back surfaces serving as both ends of the skeleton in such a manner that an opening surface is directed outward; an H-shaped fitting is engaged with the opposed mutual C-shaped fittings by making front and back surfaces of the two self-supporting sound-absorbing plates butt against each other, so that the self-supporting sound-absorbing plates can be rapidly connected together. The porous concrete panel is designed so that a maximum value of a sound absorbing coefficient can be set at about 1,000 Hz by setting a porosity to be in the range of 24-30% and setting a thickness to be in the range of 30-50 mm, and the sound absorbing coefficient is made to correspond to a main frequency band of a traffic noise. Additionally, a surface of the porous concrete panel is coated with a photocatalyst, so that the sound-absorbing performance can be prevented from being deteriorated caused by dirt and so that much labor for cleaning can be reduced. COPYRIGHT: (C)2005,JPO&NCIPI |
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SOLUTION: This self-supporting sound-absorbing plate 1 is composed of a fence-shaped skeleton 2 made of concrete, and a porous concrete panel 3 which is stuck on one side surface or both side surfaces of the skeleton 2. A C-shaped fitting 4 is attached to front and back surfaces serving as both ends of the skeleton in such a manner that an opening surface is directed outward; an H-shaped fitting is engaged with the opposed mutual C-shaped fittings by making front and back surfaces of the two self-supporting sound-absorbing plates butt against each other, so that the self-supporting sound-absorbing plates can be rapidly connected together. The porous concrete panel is designed so that a maximum value of a sound absorbing coefficient can be set at about 1,000 Hz by setting a porosity to be in the range of 24-30% and setting a thickness to be in the range of 30-50 mm, and the sound absorbing coefficient is made to correspond to a main frequency band of a traffic noise. Additionally, a surface of the porous concrete panel is coated with a photocatalyst, so that the sound-absorbing performance can be prevented from being deteriorated caused by dirt and so that much labor for cleaning can be reduced. 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SOLUTION: This self-supporting sound-absorbing plate 1 is composed of a fence-shaped skeleton 2 made of concrete, and a porous concrete panel 3 which is stuck on one side surface or both side surfaces of the skeleton 2. A C-shaped fitting 4 is attached to front and back surfaces serving as both ends of the skeleton in such a manner that an opening surface is directed outward; an H-shaped fitting is engaged with the opposed mutual C-shaped fittings by making front and back surfaces of the two self-supporting sound-absorbing plates butt against each other, so that the self-supporting sound-absorbing plates can be rapidly connected together. The porous concrete panel is designed so that a maximum value of a sound absorbing coefficient can be set at about 1,000 Hz by setting a porosity to be in the range of 24-30% and setting a thickness to be in the range of 30-50 mm, and the sound absorbing coefficient is made to correspond to a main frequency band of a traffic noise. 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| subjects | ACOUSTICS ACOUSTICS NOT OTHERWISE PROVIDED FOR ADDITIONAL WORK, SUCH AS EQUIPPING ROADS OR THE CONSTRUCTIONOF PLATFORMS, HELICOPTER LANDING STAGES, SIGNS, SNOW FENCES, ORTHE LIKE CONSTRUCTION OF ROADS, RAILWAYS, OR BRIDGES FIXED CONSTRUCTIONS METHODS OR DEVICES FOR PROTECTING AGAINST, OR FOR DAMPING,NOISE OR OTHER ACOUSTIC WAVES IN GENERAL MUSICAL INSTRUMENTS PHYSICS SOUND-PRODUCING DEVICES |
| title | SELF-SUPPORTING SOUND-ABSORBING PLATE |
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